Derivative Instruments - Notional Amount of Derivative Contracts (Details) - USD ($) $ in Billions	Sep. 30, 2024	Dec. 31, 2023
Notional amount of derivative contracts outstanding
Derivative notional amounts	$ 60,636	$ 49,813
Interest rate contracts
Notional amount of derivative contracts outstanding
Derivative notional amounts	38,956	32,673
Swaps
Notional amount of derivative contracts outstanding
Derivative notional amounts	27,623	23,251
Futures and forwards
Notional amount of derivative contracts outstanding
Derivative notional amounts	4,439	2,690
Options | Written options
Notional amount of derivative contracts outstanding
Derivative notional amounts	3,439	3,370
Options | Purchased options
Notional amount of derivative contracts outstanding
Derivative notional amounts	3,455	3,362
Credit derivatives
Notional amount of derivative contracts outstanding
Derivative notional amounts	1,523	1,045
Foreign exchange contracts
Notional amount of derivative contracts outstanding
Derivative notional amounts	16,571	13,306
Cross-currency swaps
Notional amount of derivative contracts outstanding
Derivative notional amounts	5,002	4,721
Spot, futures and forwards
Notional amount of derivative contracts outstanding
Derivative notional amounts	9,495	6,957
Options | Written options
Notional amount of derivative contracts outstanding
Derivative notional amounts	1,047	830
Options | Purchased options
Notional amount of derivative contracts outstanding
Derivative notional amounts	1,027	798
Equity contracts
Notional amount of derivative contracts outstanding
Derivative notional amounts	2,947	2,272
Swaps
Notional amount of derivative contracts outstanding
Derivative notional amounts	856	639
Futures and forwards
Notional amount of derivative contracts outstanding
Derivative notional amounts	187	157
Options | Written options
Notional amount of derivative contracts outstanding
Derivative notional amounts	1,016	778
Options | Purchased options
Notional amount of derivative contracts outstanding
Derivative notional amounts	888	698
Commodity contracts
Notional amount of derivative contracts outstanding
Derivative notional amounts	639	517
Swaps
Notional amount of derivative contracts outstanding
Derivative notional amounts	134	115
Spot, futures and forwards
Notional amount of derivative contracts outstanding
Derivative notional amounts	211	157
Options | Written options
Notional amount of derivative contracts outstanding
Derivative notional amounts	159	130
Options | Purchased options
Notional amount of derivative contracts outstanding
Derivative notional amounts	$ 135	$ 115